Rubrikennavigation

Digital PA Lab

Future wireless communication infrastructure requires a more efficient power management and highest flexibility. The microwave power amplifiers together with the modulation of the input signal determine the overall system efficiency and thereby the operating cost. Given the system requirements and the growing demands regarding flexibility, the long-term target is the complete digital transmitter.

At FBH, new digital modulation schemes and amplifier designs are developed in the framework of a Leibniz project to fabricate integrated power amplifier circuits and modules for the microwave range. They are realized in GaN-HEMT technology and target applications in mobile base stations. Furthermore a new DFG granted project investigates the potential of a digitally designed supply modulator in an envelope-tracking system. The goal is to build an energy-efficient PA at 28 GHz with extreme signal bandwidths of more than 1 GHz for future 5G applications.

Furthermore, for the first time, the digital concept is transferred to the sub-THz-region based on FBH InP-DHBT technology to develop efficient PAs for very high signal bandwidths in the course of 5G.